1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun #ifndef _I386_HW_BREAKPOINT_H
3*4882a593Smuzhiyun #define _I386_HW_BREAKPOINT_H
4*4882a593Smuzhiyun
5*4882a593Smuzhiyun #include <uapi/asm/hw_breakpoint.h>
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun #define __ARCH_HW_BREAKPOINT_H
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun /*
10*4882a593Smuzhiyun * The name should probably be something dealt in
11*4882a593Smuzhiyun * a higher level. While dealing with the user
12*4882a593Smuzhiyun * (display/resolving)
13*4882a593Smuzhiyun */
14*4882a593Smuzhiyun struct arch_hw_breakpoint {
15*4882a593Smuzhiyun unsigned long address;
16*4882a593Smuzhiyun unsigned long mask;
17*4882a593Smuzhiyun u8 len;
18*4882a593Smuzhiyun u8 type;
19*4882a593Smuzhiyun };
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun #include <linux/kdebug.h>
22*4882a593Smuzhiyun #include <linux/percpu.h>
23*4882a593Smuzhiyun #include <linux/list.h>
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun /* Available HW breakpoint length encodings */
26*4882a593Smuzhiyun #define X86_BREAKPOINT_LEN_X 0x40
27*4882a593Smuzhiyun #define X86_BREAKPOINT_LEN_1 0x40
28*4882a593Smuzhiyun #define X86_BREAKPOINT_LEN_2 0x44
29*4882a593Smuzhiyun #define X86_BREAKPOINT_LEN_4 0x4c
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun #ifdef CONFIG_X86_64
32*4882a593Smuzhiyun #define X86_BREAKPOINT_LEN_8 0x48
33*4882a593Smuzhiyun #endif
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun /* Available HW breakpoint type encodings */
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun /* trigger on instruction execute */
38*4882a593Smuzhiyun #define X86_BREAKPOINT_EXECUTE 0x80
39*4882a593Smuzhiyun /* trigger on memory write */
40*4882a593Smuzhiyun #define X86_BREAKPOINT_WRITE 0x81
41*4882a593Smuzhiyun /* trigger on memory read or write */
42*4882a593Smuzhiyun #define X86_BREAKPOINT_RW 0x83
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun /* Total number of available HW breakpoint registers */
45*4882a593Smuzhiyun #define HBP_NUM 4
46*4882a593Smuzhiyun
hw_breakpoint_slots(int type)47*4882a593Smuzhiyun static inline int hw_breakpoint_slots(int type)
48*4882a593Smuzhiyun {
49*4882a593Smuzhiyun return HBP_NUM;
50*4882a593Smuzhiyun }
51*4882a593Smuzhiyun
52*4882a593Smuzhiyun struct perf_event_attr;
53*4882a593Smuzhiyun struct perf_event;
54*4882a593Smuzhiyun struct pmu;
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun extern int arch_check_bp_in_kernelspace(struct arch_hw_breakpoint *hw);
57*4882a593Smuzhiyun extern int hw_breakpoint_arch_parse(struct perf_event *bp,
58*4882a593Smuzhiyun const struct perf_event_attr *attr,
59*4882a593Smuzhiyun struct arch_hw_breakpoint *hw);
60*4882a593Smuzhiyun extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
61*4882a593Smuzhiyun unsigned long val, void *data);
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun int arch_install_hw_breakpoint(struct perf_event *bp);
65*4882a593Smuzhiyun void arch_uninstall_hw_breakpoint(struct perf_event *bp);
66*4882a593Smuzhiyun void hw_breakpoint_pmu_read(struct perf_event *bp);
67*4882a593Smuzhiyun void hw_breakpoint_pmu_unthrottle(struct perf_event *bp);
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun extern void
70*4882a593Smuzhiyun arch_fill_perf_breakpoint(struct perf_event *bp);
71*4882a593Smuzhiyun
72*4882a593Smuzhiyun unsigned long encode_dr7(int drnum, unsigned int len, unsigned int type);
73*4882a593Smuzhiyun int decode_dr7(unsigned long dr7, int bpnum, unsigned *len, unsigned *type);
74*4882a593Smuzhiyun
75*4882a593Smuzhiyun extern int arch_bp_generic_fields(int x86_len, int x86_type,
76*4882a593Smuzhiyun int *gen_len, int *gen_type);
77*4882a593Smuzhiyun
78*4882a593Smuzhiyun extern struct pmu perf_ops_bp;
79*4882a593Smuzhiyun
80*4882a593Smuzhiyun #endif /* _I386_HW_BREAKPOINT_H */
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